Never had any issues with my Chinese generic carbon cages. The unbranded one in the link above looks like a good option. Mind you, I think I paid 7 - 8 quid for mine at the time.
EDIT: Searching for "matte carbon bottle holder" on Ebay.com seems to send you straight to the bargain bin. But yeah, probably worth paying a few quid extra for the Bontrager copies.
Have got some really old ones that have gone to shit and never really held bottles properly. Especially on the seat tube. Going to get some of those Bontranger knock-offs. Had some on my old commuter and they're very effective.
Never had any issues with my Chinese generic carbon cages. The unbranded one in the link above looks like a good option. Mind you, I think I paid 7 - 8 quid for mine at the time.
EDIT: Searching for "matte carbon bottle holder" on Ebay.com seems to send you straight to the bargain bin. But yeah, probably worth paying a few quid extra for the Bontrager copies.